Q. An open pipe of length $33\ cm$ resonates with frequency of $100\ Hz.$ If the speed of sound is $330\ m/s,$ then this frequency is
A) Fundamental frequency of the pipe
B) Third harmonic of the pipe
C) Second harmonic of the pipe
D) Fourth harmonic of the pipe
Explanation
(c) Frequency of $p\ th$ harmonic
$n = \frac{pv}{2l} \Rightarrow p = \frac{2ln}{v} = \frac{2 \times 0.33 \times 1000}{330} = 2$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.